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DSLR Observing Manual in French

The AAVSO DSLR Observing Manual is now available in French!

Many thanks once again to Bernard Candela for all the hard work he put into producing this translation. We hope that our French-speaking members and observers will find this manual helpful and will share it with their colleagues.

To download a copy (free-of-charge), please visit the DSLR Observing Manual webpage.

In addition to English, this Manual is also available in Greek and Spanish.

Alert Notice 580: ASASSN-17fp rebrightening event and ongoing monitoring

May 24, 2017: ASASSN-17fp, discovered on 2017 April 28 and classified as a helium dwarf nova, was observed to be in outburst again on May 16 after fading 2.5 magnitudes from its original outburst. Dr. Tom Marsh (University of Warwick) and Dr. Elme Breedt (University of Cambridge) requested immediate time-series coverage.

Alert Notice 579: KIC 8462852 optical dipping event

May 24, 2017: T. Boyajian (Louisiana State University) et al. reported in ATel #10405 that an optical dip is underway in KIC 8462852 (Boyajian's Star, Tabby's Star) beginning on 2017 May 18 UT. Tentative signs of small dips had been seen beginning April 24, and enhanced monitoring had begun at once at Fairborn Observatory (Tennessee State University). Photometry and spectroscopy from there on May 18 and 19 UT showed a dip underway.

Alert Notice 578: Nova in Centaurus - ASASSN-17gk

May 23, 2017

Event: Nova in Centaurus - ASASSN-17gk

Discovered by: All Sky Automated Survey for SuperNovae (ASAS-SN, (K. Z. Stanek (OSU) et al., ATel #10387)

Discovery magnitude: 10.9 V

Alert Notice 577: SN 2017eaw in NGC 6946 (PSN J20344424+6011359)

Correction: The original announcement of this Alert Notice included the incorrect assignment of observations made by David Boyd to David Blane. The attribution has been corrected in the observations below. We extend sincere apologies to David Boyd for the error. -- EOW  May 17, 2017

May 16, 2017

Event: SN 2017eaw - bright supernova in NGC 6946 (Cepheus)

Discovered by: Patrick Wiggins (Tooele, UT)

Solar Bulletin - Volume 73, Number 04

The April Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

The April SID Data report is available here: https://www.aavso.org/sid-database

Solar Observing Guide - in French

Thanks to a wonderful volunteer effort by Bernard Candela, we now have available a French translation of The AAVSO Solar Observing Guide!  Many thanks Bernard!

 

Alert Notice 576: Nova in Ophiuchus - TCP J17394608-2457555

May 11, 2017

Event: Nova in Ophiuchus

Discovered by: Koichi Itagaki (Yamagata, Japan)

Discovery magnitude: magnitude 13.6 (CCD, unfiltered, using 0.20-m f/3.0 reflector + CCD)

Special Notice #429: V694 Mon (MWC 560) spectroscopy requested

May 2, 2017: Further to AAVSO Alert Notice 538, the campaign from 2016 on V694 Mon (MWC 560) has been continued, but with different requirements. Photometry is no longer specifically requested on a regular basis (although ongoing observations that do not interfere with other obligations are welcome). Spectroscopy on a cadence of a week or two is requested to monitor changes in the disk outflow. V694 Mon is presently nearing opposition, but the request for spectroscopy continues until further notice.

Alert Notice 575: Monitoring of Swift J1357.2-0933 (CRTS J135716.8-093238) requested

April 28, 2017: Dr. Gregory Sivakoff (University of Alberta) has requested AAVSO observers' assistance in monitoring Swift J1357.2-0933 (CRTS J135716.8-093238) during its current outburst.

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